crypto/openssl/ssl/ssl_lib.c

   1 /*! \file ssl/ssl_lib.c
   2  *  \brief Version independent SSL functions.
   3  */
   4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   5  * All rights reserved.
   6  *
   7  * This package is an SSL implementation written
   8  * by Eric Young (eay@cryptsoft.com).
   9  * The implementation was written so as to conform with Netscapes SSL.
  10  *
  11  * This library is free for commercial and non-commercial use as long as
  12  * the following conditions are aheared to.  The following conditions
  13  * apply to all code found in this distribution, be it the RC4, RSA,
  14  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  15  * included with this distribution is covered by the same copyright terms
  16  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  17  *
  18  * Copyright remains Eric Young's, and as such any Copyright notices in
  19  * the code are not to be removed.
  20  * If this package is used in a product, Eric Young should be given attribution
  21  * as the author of the parts of the library used.
  22  * This can be in the form of a textual message at program startup or
  23  * in documentation (online or textual) provided with the package.
  24  *
  25  * Redistribution and use in source and binary forms, with or without
  26  * modification, are permitted provided that the following conditions
  27  * are met:
  28  * 1. Redistributions of source code must retain the copyright
  29  *    notice, this list of conditions and the following disclaimer.
  30  * 2. Redistributions in binary form must reproduce the above copyright
  31  *    notice, this list of conditions and the following disclaimer in the
  32  *    documentation and/or other materials provided with the distribution.
  33  * 3. All advertising materials mentioning features or use of this software
  34  *    must display the following acknowledgement:
  35  *    "This product includes cryptographic software written by
  36  *     Eric Young (eay@cryptsoft.com)"
  37  *    The word 'cryptographic' can be left out if the rouines from the library
  38  *    being used are not cryptographic related :-).
  39  * 4. If you include any Windows specific code (or a derivative thereof) from
  40  *    the apps directory (application code) you must include an acknowledgement:
  41  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  * The licence and distribution terms for any publically available version or
  56  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  57  * copied and put under another distribution licence
  58  * [including the GNU Public Licence.]
  59  */
  60 /* ====================================================================
  61  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  62  *
  63  * Redistribution and use in source and binary forms, with or without
  64  * modification, are permitted provided that the following conditions
  65  * are met:
  66  *
  67  * 1. Redistributions of source code must retain the above copyright
  68  *    notice, this list of conditions and the following disclaimer.
  69  *
  70  * 2. Redistributions in binary form must reproduce the above copyright
  71  *    notice, this list of conditions and the following disclaimer in
  72  *    the documentation and/or other materials provided with the
  73  *    distribution.
  74  *
  75  * 3. All advertising materials mentioning features or use of this
  76  *    software must display the following acknowledgment:
  77  *    "This product includes software developed by the OpenSSL Project
  78  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  79  *
  80  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  81  *    endorse or promote products derived from this software without
  82  *    prior written permission. For written permission, please contact
  83  *    openssl-core@openssl.org.
  84  *
  85  * 5. Products derived from this software may not be called "OpenSSL"
  86  *    nor may "OpenSSL" appear in their names without prior written
  87  *    permission of the OpenSSL Project.
  88  *
  89  * 6. Redistributions of any form whatsoever must retain the following
  90  *    acknowledgment:
  91  *    "This product includes software developed by the OpenSSL Project
  92  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  93  *
  94  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  95  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  96  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  97  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  98  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  99  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 100  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 101  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 102  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 103  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 104  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 105  * OF THE POSSIBILITY OF SUCH DAMAGE.
 106  * ====================================================================
 107  *
 108  * This product includes cryptographic software written by Eric Young
 109  * (eay@cryptsoft.com).  This product includes software written by Tim
 110  * Hudson (tjh@cryptsoft.com).
 111  *
 112  */
 113 /* ====================================================================
 114  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 115  * ECC cipher suite support in OpenSSL originally developed by
 116  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 117  */
 118 /* ====================================================================
 119  * Copyright 2005 Nokia. All rights reserved.
 120  *
 121  * The portions of the attached software ("Contribution") is developed by
 122  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 123  * license.
 124  *
 125  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 126  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 127  * support (see RFC 4279) to OpenSSL.
 128  *
 129  * No patent licenses or other rights except those expressly stated in
 130  * the OpenSSL open source license shall be deemed granted or received
 131  * expressly, by implication, estoppel, or otherwise.
 132  *
 133  * No assurances are provided by Nokia that the Contribution does not
 134  * infringe the patent or other intellectual property rights of any third
 135  * party or that the license provides you with all the necessary rights
 136  * to make use of the Contribution.
 137  *
 138  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 139  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 140  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 141  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 142  * OTHERWISE.
 143  */
 144
 145 #ifdef REF_CHECK
 146 #  include <assert.h>
 147 #endif
 148 #include <stdio.h>
 149 #include "ssl_locl.h"
 150 #include "kssl_lcl.h"
 151 #include <openssl/objects.h>
 152 #include <openssl/lhash.h>
 153 #include <openssl/x509v3.h>
 154 #include <openssl/rand.h>
 155 #include <openssl/ocsp.h>
 156 #ifndef OPENSSL_NO_DH
 157 #include <openssl/dh.h>
 158 #endif
 159 #ifndef OPENSSL_NO_ENGINE
 160 #include <openssl/engine.h>
 161 #endif
 162
 163 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
 164
 165 SSL3_ENC_METHOD ssl3_undef_enc_method={
 166         /* evil casts, but these functions are only called if there's a library bug */
 167         (int (*)(SSL *,int))ssl_undefined_function,
 168         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
 169         ssl_undefined_function,
 170         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
 171         (int (*)(SSL*, int))ssl_undefined_function,
 172         (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
 173         0,      /* finish_mac_length */
 174         (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
 175         NULL,   /* client_finished_label */
 176         0,      /* client_finished_label_len */
 177         NULL,   /* server_finished_label */
 178         0,      /* server_finished_label_len */
 179         (int (*)(int))ssl_undefined_function,
 180         (int (*)(SSL *, unsigned char *, size_t, const char *,
 181                  size_t, const unsigned char *, size_t,
 182                  int use_context)) ssl_undefined_function,
 183         };
 184
 185 int SSL_clear(SSL *s)
 186         {
 187
 188         if (s->method == NULL)
 189                 {
 190                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
 191                 return(0);
 192                 }
 193
 194         if (ssl_clear_bad_session(s))
 195                 {
 196                 SSL_SESSION_free(s->session);
 197                 s->session=NULL;
 198                 }
 199
 200         s->error=0;
 201         s->hit=0;
 202         s->shutdown=0;
 203
 204 #if 0 /* Disabled since version 1.10 of this file (early return not
 205        * needed because SSL_clear is not called when doing renegotiation) */
 206         /* This is set if we are doing dynamic renegotiation so keep
 207          * the old cipher.  It is sort of a SSL_clear_lite :-) */
 208         if (s->renegotiate) return(1);
 209 #else
 210         if (s->renegotiate)
 211                 {
 212                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
 213                 return 0;
 214                 }
 215 #endif
 216
 217         s->type=0;
 218
 219         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
 220
 221         s->version=s->method->version;
 222         s->client_version=s->version;
 223         s->rwstate=SSL_NOTHING;
 224         s->rstate=SSL_ST_READ_HEADER;
 225 #if 0
 226         s->read_ahead=s->ctx->read_ahead;
 227 #endif
 228
 229         if (s->init_buf != NULL)
 230                 {
 231                 BUF_MEM_free(s->init_buf);
 232                 s->init_buf=NULL;
 233                 }
 234
 235         ssl_clear_cipher_ctx(s);
 236         ssl_clear_hash_ctx(&s->read_hash);
 237         ssl_clear_hash_ctx(&s->write_hash);
 238
 239         s->first_packet=0;
 240
 241 #if 1
 242         /* Check to see if we were changed into a different method, if
 243          * so, revert back if we are not doing session-id reuse. */
 244         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
 245                 {
 246                 s->method->ssl_free(s);
 247                 s->method=s->ctx->method;
 248                 if (!s->method->ssl_new(s))
 249                         return(0);
 250                 }
 251         else
 252 #endif
 253                 s->method->ssl_clear(s);
 254         return(1);
 255         }
 256
 257 /** Used to change an SSL_CTXs default SSL method type */
 258 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
 259         {
 260         STACK_OF(SSL_CIPHER) *sk;
 261
 262         ctx->method=meth;
 263
 264         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 265                 &(ctx->cipher_list_by_id),
 266                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
 267         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 268                 {
 269                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 270                 return(0);
 271                 }
 272         return(1);
 273         }
 274
 275 SSL *SSL_new(SSL_CTX *ctx)
 276         {
 277         SSL *s;
 278
 279         if (ctx == NULL)
 280                 {
 281                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 282                 return(NULL);
 283                 }
 284         if (ctx->method == NULL)
 285                 {
 286                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 287                 return(NULL);
 288                 }
 289
 290         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
 291         if (s == NULL) goto err;
 292         memset(s,0,sizeof(SSL));
 293
 294 #ifndef OPENSSL_NO_KRB5
 295         s->kssl_ctx = kssl_ctx_new();
 296 #endif  /* OPENSSL_NO_KRB5 */
 297
 298         s->options=ctx->options;
 299         s->mode=ctx->mode;
 300         s->max_cert_list=ctx->max_cert_list;
 301
 302         if (ctx->cert != NULL)
 303                 {
 304                 /* Earlier library versions used to copy the pointer to
 305                  * the CERT, not its contents; only when setting new
 306                  * parameters for the per-SSL copy, ssl_cert_new would be
 307                  * called (and the direct reference to the per-SSL_CTX
 308                  * settings would be lost, but those still were indirectly
 309                  * accessed for various purposes, and for that reason they
 310                  * used to be known as s->ctx->default_cert).
 311                  * Now we don't look at the SSL_CTX's CERT after having
 312                  * duplicated it once. */
 313
 314                 s->cert = ssl_cert_dup(ctx->cert);
 315                 if (s->cert == NULL)
 316                         goto err;
 317                 }
 318         else
 319                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 320
 321         s->read_ahead=ctx->read_ahead;
 322         s->msg_callback=ctx->msg_callback;
 323         s->msg_callback_arg=ctx->msg_callback_arg;
 324         s->verify_mode=ctx->verify_mode;
 325 #if 0
 326         s->verify_depth=ctx->verify_depth;
 327 #endif
 328         s->sid_ctx_length=ctx->sid_ctx_length;
 329         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
 330         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 331         s->verify_callback=ctx->default_verify_callback;
 332         s->generate_session_id=ctx->generate_session_id;
 333
 334         s->param = X509_VERIFY_PARAM_new();
 335         if (!s->param)
 336                 goto err;
 337         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
 338 #if 0
 339         s->purpose = ctx->purpose;
 340         s->trust = ctx->trust;
 341 #endif
 342         s->quiet_shutdown=ctx->quiet_shutdown;
 343         s->max_send_fragment = ctx->max_send_fragment;
 344
 345         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 346         s->ctx=ctx;
 347 #ifndef OPENSSL_NO_TLSEXT
 348         s->tlsext_debug_cb = 0;
 349         s->tlsext_debug_arg = NULL;
 350         s->tlsext_ticket_expected = 0;
 351         s->tlsext_status_type = -1;
 352         s->tlsext_status_expected = 0;
 353         s->tlsext_ocsp_ids = NULL;
 354         s->tlsext_ocsp_exts = NULL;
 355         s->tlsext_ocsp_resp = NULL;
 356         s->tlsext_ocsp_resplen = -1;
 357         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 358         s->initial_ctx=ctx;
 359 # ifndef OPENSSL_NO_NEXTPROTONEG
 360         s->next_proto_negotiated = NULL;
 361 # endif
 362 #endif
 363
 364         s->verify_result=X509_V_OK;
 365
 366         s->method=ctx->method;
 367
 368         if (!s->method->ssl_new(s))
 369                 goto err;
 370
 371         s->references=1;
 372         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 373
 374         SSL_clear(s);
 375
 376         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 377
 378 #ifndef OPENSSL_NO_PSK
 379         s->psk_client_callback=ctx->psk_client_callback;
 380         s->psk_server_callback=ctx->psk_server_callback;
 381 #endif
 382
 383         return(s);
 384 err:
 385         if (s != NULL)
 386                 {
 387                 if (s->cert != NULL)
 388                         ssl_cert_free(s->cert);
 389                 if (s->ctx != NULL)
 390                         SSL_CTX_free(s->ctx); /* decrement reference count */
 391                 OPENSSL_free(s);
 392                 }
 393         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 394         return(NULL);
 395         }
 396
 397 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 398                                    unsigned int sid_ctx_len)
 399     {
 400     if(sid_ctx_len > sizeof ctx->sid_ctx)
 401         {
 402         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 403         return 0;
 404         }
 405     ctx->sid_ctx_length=sid_ctx_len;
 406     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 407
 408     return 1;
 409     }
 410
 411 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 412                                unsigned int sid_ctx_len)
 413     {
 414     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 415         {
 416         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 417         return 0;
 418         }
 419     ssl->sid_ctx_length=sid_ctx_len;
 420     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 421
 422     return 1;
 423     }
 424
 425 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 426         {
 427         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 428         ctx->generate_session_id = cb;
 429         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 430         return 1;
 431         }
 432
 433 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 434         {
 435         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 436         ssl->generate_session_id = cb;
 437         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 438         return 1;
 439         }
 440
 441 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 442                                 unsigned int id_len)
 443         {
 444         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
 445          * we can "construct" a session to give us the desired check - ie. to
 446          * find if there's a session in the hash table that would conflict with
 447          * any new session built out of this id/id_len and the ssl_version in
 448          * use by this SSL. */
 449         SSL_SESSION r, *p;
 450
 451         if(id_len > sizeof r.session_id)
 452                 return 0;
 453
 454         r.ssl_version = ssl->version;
 455         r.session_id_length = id_len;
 456         memcpy(r.session_id, id, id_len);
 457         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
 458          * callback is calling us to check the uniqueness of a shorter ID, it
 459          * must be compared as a padded-out ID because that is what it will be
 460          * converted to when the callback has finished choosing it. */
 461         if((r.ssl_version == SSL2_VERSION) &&
 462                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
 463                 {
 464                 memset(r.session_id + id_len, 0,
 465                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
 466                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
 467                 }
 468
 469         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 470         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
 471         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
 472         return (p != NULL);
 473         }
 474
 475 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
 476         {
 477         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 478         }
 479
 480 int SSL_set_purpose(SSL *s, int purpose)
 481         {
 482         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
 483         }
 484
 485 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
 486         {
 487         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 488         }
 489
 490 int SSL_set_trust(SSL *s, int trust)
 491         {
 492         return X509_VERIFY_PARAM_set_trust(s->param, trust);
 493         }
 494
 495 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 496         {
 497         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
 498         }
 499
 500 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
 501         {
 502         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
 503         }
 504
 505 void SSL_free(SSL *s)
 506         {
 507         int i;
 508
 509         if(s == NULL)
 510             return;
 511
 512         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 513 #ifdef REF_PRINT
 514         REF_PRINT("SSL",s);
 515 #endif
 516         if (i > 0) return;
 517 #ifdef REF_CHECK
 518         if (i < 0)
 519                 {
 520                 fprintf(stderr,"SSL_free, bad reference count\n");
 521                 abort(); /* ok */
 522                 }
 523 #endif
 524
 525         if (s->param)
 526                 X509_VERIFY_PARAM_free(s->param);
 527
 528         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 529
 530         if (s->bbio != NULL)
 531                 {
 532                 /* If the buffering BIO is in place, pop it off */
 533                 if (s->bbio == s->wbio)
 534                         {
 535                         s->wbio=BIO_pop(s->wbio);
 536                         }
 537                 BIO_free(s->bbio);
 538                 s->bbio=NULL;
 539                 }
 540         if (s->rbio != NULL)
 541                 BIO_free_all(s->rbio);
 542         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 543                 BIO_free_all(s->wbio);
 544
 545         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 546
 547         /* add extra stuff */
 548         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 549         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 550
 551         /* Make the next call work :-) */
 552         if (s->session != NULL)
 553                 {
 554                 ssl_clear_bad_session(s);
 555                 SSL_SESSION_free(s->session);
 556                 }
 557
 558         ssl_clear_cipher_ctx(s);
 559         ssl_clear_hash_ctx(&s->read_hash);
 560         ssl_clear_hash_ctx(&s->write_hash);
 561
 562         if (s->cert != NULL) ssl_cert_free(s->cert);
 563         /* Free up if allocated */
 564
 565 #ifndef OPENSSL_NO_TLSEXT
 566         if (s->tlsext_hostname)
 567                 OPENSSL_free(s->tlsext_hostname);
 568         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
 569 #ifndef OPENSSL_NO_EC
 570         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
 571         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
 572 #endif /* OPENSSL_NO_EC */
 573         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
 574         if (s->tlsext_ocsp_exts)
 575                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
 576                                                 X509_EXTENSION_free);
 577         if (s->tlsext_ocsp_ids)
 578                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
 579         if (s->tlsext_ocsp_resp)
 580                 OPENSSL_free(s->tlsext_ocsp_resp);
 581 #endif
 582
 583         if (s->client_CA != NULL)
 584                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 585
 586         if (s->method != NULL) s->method->ssl_free(s);
 587
 588         if (s->ctx) SSL_CTX_free(s->ctx);
 589
 590 #ifndef OPENSSL_NO_KRB5
 591         if (s->kssl_ctx != NULL)
 592                 kssl_ctx_free(s->kssl_ctx);
 593 #endif  /* OPENSSL_NO_KRB5 */
 594
 595 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
 596         if (s->next_proto_negotiated)
 597                 OPENSSL_free(s->next_proto_negotiated);
 598 #endif
 599
 600 #ifndef OPENSSL_NO_SRTP
 601         if (s->srtp_profiles)
 602             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
 603 #endif
 604
 605         OPENSSL_free(s);
 606         }
 607
 608 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 609         {
 610         /* If the output buffering BIO is still in place, remove it
 611          */
 612         if (s->bbio != NULL)
 613                 {
 614                 if (s->wbio == s->bbio)
 615                         {
 616                         s->wbio=s->wbio->next_bio;
 617                         s->bbio->next_bio=NULL;
 618                         }
 619                 }
 620         if ((s->rbio != NULL) && (s->rbio != rbio))
 621                 BIO_free_all(s->rbio);
 622         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 623                 BIO_free_all(s->wbio);
 624         s->rbio=rbio;
 625         s->wbio=wbio;
 626         }
 627
 628 BIO *SSL_get_rbio(const SSL *s)
 629         { return(s->rbio); }
 630
 631 BIO *SSL_get_wbio(const SSL *s)
 632         { return(s->wbio); }
 633
 634 int SSL_get_fd(const SSL *s)
 635         {
 636         return(SSL_get_rfd(s));
 637         }
 638
 639 int SSL_get_rfd(const SSL *s)
 640         {
 641         int ret= -1;
 642         BIO *b,*r;
 643
 644         b=SSL_get_rbio(s);
 645         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 646         if (r != NULL)
 647                 BIO_get_fd(r,&ret);
 648         return(ret);
 649         }
 650
 651 int SSL_get_wfd(const SSL *s)
 652         {
 653         int ret= -1;
 654         BIO *b,*r;
 655
 656         b=SSL_get_wbio(s);
 657         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 658         if (r != NULL)
 659                 BIO_get_fd(r,&ret);
 660         return(ret);
 661         }
 662
 663 #ifndef OPENSSL_NO_SOCK
 664 int SSL_set_fd(SSL *s,int fd)
 665         {
 666         int ret=0;
 667         BIO *bio=NULL;
 668
 669         bio=BIO_new(BIO_s_socket());
 670
 671         if (bio == NULL)
 672                 {
 673                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 674                 goto err;
 675                 }
 676         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 677         SSL_set_bio(s,bio,bio);
 678         ret=1;
 679 err:
 680         return(ret);
 681         }
 682
 683 int SSL_set_wfd(SSL *s,int fd)
 684         {
 685         int ret=0;
 686         BIO *bio=NULL;
 687
 688         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 689                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 690                 {
 691                 bio=BIO_new(BIO_s_socket());
 692
 693                 if (bio == NULL)
 694                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 695                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 696                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 697                 }
 698         else
 699                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 700         ret=1;
 701 err:
 702         return(ret);
 703         }
 704
 705 int SSL_set_rfd(SSL *s,int fd)
 706         {
 707         int ret=0;
 708         BIO *bio=NULL;
 709
 710         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 711                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 712                 {
 713                 bio=BIO_new(BIO_s_socket());
 714
 715                 if (bio == NULL)
 716                         {
 717                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 718                         goto err;
 719                         }
 720                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 721                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 722                 }
 723         else
 724                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 725         ret=1;
 726 err:
 727         return(ret);
 728         }
 729 #endif
 730
 731
 732 /* return length of latest Finished message we sent, copy to 'buf' */
 733 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
 734         {
 735         size_t ret = 0;
 736
 737         if (s->s3 != NULL)
 738                 {
 739                 ret = s->s3->tmp.finish_md_len;
 740                 if (count > ret)
 741                         count = ret;
 742                 memcpy(buf, s->s3->tmp.finish_md, count);
 743                 }
 744         return ret;
 745         }
 746
 747 /* return length of latest Finished message we expected, copy to 'buf' */
 748 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 749         {
 750         size_t ret = 0;
 751
 752         if (s->s3 != NULL)
 753                 {
 754                 ret = s->s3->tmp.peer_finish_md_len;
 755                 if (count > ret)
 756                         count = ret;
 757                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
 758                 }
 759         return ret;
 760         }
 761
 762
 763 int SSL_get_verify_mode(const SSL *s)
 764         {
 765         return(s->verify_mode);
 766         }
 767
 768 int SSL_get_verify_depth(const SSL *s)
 769         {
 770         return X509_VERIFY_PARAM_get_depth(s->param);
 771         }
 772
 773 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
 774         {
 775         return(s->verify_callback);
 776         }
 777
 778 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 779         {
 780         return(ctx->verify_mode);
 781         }
 782
 783 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 784         {
 785         return X509_VERIFY_PARAM_get_depth(ctx->param);
 786         }
 787
 788 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
 789         {
 790         return(ctx->default_verify_callback);
 791         }
 792
 793 void SSL_set_verify(SSL *s,int mode,
 794                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 795         {
 796         s->verify_mode=mode;
 797         if (callback != NULL)
 798                 s->verify_callback=callback;
 799         }
 800
 801 void SSL_set_verify_depth(SSL *s,int depth)
 802         {
 803         X509_VERIFY_PARAM_set_depth(s->param, depth);
 804         }
 805
 806 void SSL_set_read_ahead(SSL *s,int yes)
 807         {
 808         s->read_ahead=yes;
 809         }
 810
 811 int SSL_get_read_ahead(const SSL *s)
 812         {
 813         return(s->read_ahead);
 814         }
 815
 816 int SSL_pending(const SSL *s)
 817         {
 818         /* SSL_pending cannot work properly if read-ahead is enabled
 819          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
 820          * and it is impossible to fix since SSL_pending cannot report
 821          * errors that may be observed while scanning the new data.
 822          * (Note that SSL_pending() is often used as a boolean value,
 823          * so we'd better not return -1.)
 824          */
 825         return(s->method->ssl_pending(s));
 826         }
 827
 828 X509 *SSL_get_peer_certificate(const SSL *s)
 829         {
 830         X509 *r;
 831
 832         if ((s == NULL) || (s->session == NULL))
 833                 r=NULL;
 834         else
 835                 r=s->session->peer;
 836
 837         if (r == NULL) return(r);
 838
 839         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 840
 841         return(r);
 842         }
 843
 844 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 845         {
 846         STACK_OF(X509) *r;
 847
 848         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
 849                 r=NULL;
 850         else
 851                 r=s->session->sess_cert->cert_chain;
 852
 853         /* If we are a client, cert_chain includes the peer's own
 854          * certificate; if we are a server, it does not. */
 855
 856         return(r);
 857         }
 858
 859 /* Now in theory, since the calling process own 't' it should be safe to
 860  * modify.  We need to be able to read f without being hassled */
 861 void SSL_copy_session_id(SSL *t,const SSL *f)
 862         {
 863         CERT *tmp;
 864
 865         /* Do we need to to SSL locking? */
 866         SSL_set_session(t,SSL_get_session(f));
 867
 868         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 869          * vice-versa */
 870         if (t->method != f->method)
 871                 {
 872                 t->method->ssl_free(t); /* cleanup current */
 873                 t->method=f->method;    /* change method */
 874                 t->method->ssl_new(t);  /* setup new */
 875                 }
 876
 877         tmp=t->cert;
 878         if (f->cert != NULL)
 879                 {
 880                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 881                 t->cert=f->cert;
 882                 }
 883         else
 884                 t->cert=NULL;
 885         if (tmp != NULL) ssl_cert_free(tmp);
 886         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 887         }
 888
 889 /* Fix this so it checks all the valid key/cert options */
 890 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 891         {
 892         if (    (ctx == NULL) ||
 893                 (ctx->cert == NULL) ||
 894                 (ctx->cert->key->x509 == NULL))
 895                 {
 896                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 897                 return(0);
 898                 }
 899         if      (ctx->cert->key->privatekey == NULL)
 900                 {
 901                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 902                 return(0);
 903                 }
 904         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 905         }
 906
 907 /* Fix this function so that it takes an optional type parameter */
 908 int SSL_check_private_key(const SSL *ssl)
 909         {
 910         if (ssl == NULL)
 911                 {
 912                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 913                 return(0);
 914                 }
 915         if (ssl->cert == NULL)
 916                 {
 917                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 918                 return 0;
 919                 }
 920         if (ssl->cert->key->x509 == NULL)
 921                 {
 922                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 923                 return(0);
 924                 }
 925         if (ssl->cert->key->privatekey == NULL)
 926                 {
 927                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 928                 return(0);
 929                 }
 930         return(X509_check_private_key(ssl->cert->key->x509,
 931                 ssl->cert->key->privatekey));
 932         }
 933
 934 int SSL_accept(SSL *s)
 935         {
 936         if (s->handshake_func == 0)
 937                 /* Not properly initialized yet */
 938                 SSL_set_accept_state(s);
 939
 940         return(s->method->ssl_accept(s));
 941         }
 942
 943 int SSL_connect(SSL *s)
 944         {
 945         if (s->handshake_func == 0)
 946                 /* Not properly initialized yet */
 947                 SSL_set_connect_state(s);
 948
 949         return(s->method->ssl_connect(s));
 950         }
 951
 952 long SSL_get_default_timeout(const SSL *s)
 953         {
 954         return(s->method->get_timeout());
 955         }
 956
 957 int SSL_read(SSL *s,void *buf,int num)
 958         {
 959         if (s->handshake_func == 0)
 960                 {
 961                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 962                 return -1;
 963                 }
 964
 965         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 966                 {
 967                 s->rwstate=SSL_NOTHING;
 968                 return(0);
 969                 }
 970         return(s->method->ssl_read(s,buf,num));
 971         }
 972
 973 int SSL_peek(SSL *s,void *buf,int num)
 974         {
 975         if (s->handshake_func == 0)
 976                 {
 977                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
 978                 return -1;
 979                 }
 980
 981         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 982                 {
 983                 return(0);
 984                 }
 985         return(s->method->ssl_peek(s,buf,num));
 986         }
 987
 988 int SSL_write(SSL *s,const void *buf,int num)
 989         {
 990         if (s->handshake_func == 0)
 991                 {
 992                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
 993                 return -1;
 994                 }
 995
 996         if (s->shutdown & SSL_SENT_SHUTDOWN)
 997                 {
 998                 s->rwstate=SSL_NOTHING;
 999                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
1000                 return(-1);
1001                 }
1002         return(s->method->ssl_write(s,buf,num));
1003         }
1004
1005 int SSL_shutdown(SSL *s)
1006         {
1007         /* Note that this function behaves differently from what one might
1008          * expect.  Return values are 0 for no success (yet),
1009          * 1 for success; but calling it once is usually not enough,
1010          * even if blocking I/O is used (see ssl3_shutdown).
1011          */
1012
1013         if (s->handshake_func == 0)
1014                 {
1015                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1016                 return -1;
1017                 }
1018
1019         if ((s != NULL) && !SSL_in_init(s))
1020                 return(s->method->ssl_shutdown(s));
1021         else
1022                 return(1);
1023         }
1024
1025 int SSL_renegotiate(SSL *s)
1026         {
1027         if (s->renegotiate == 0)
1028                 s->renegotiate=1;
1029
1030         s->new_session=1;
1031
1032         return(s->method->ssl_renegotiate(s));
1033         }
1034
1035 int SSL_renegotiate_abbreviated(SSL *s)
1036         {
1037         if (s->renegotiate == 0)
1038                 s->renegotiate=1;
1039
1040         s->new_session=0;
1041
1042         return(s->method->ssl_renegotiate(s));
1043         }
1044
1045 int SSL_renegotiate_pending(SSL *s)
1046         {
1047         /* becomes true when negotiation is requested;
1048          * false again once a handshake has finished */
1049         return (s->renegotiate != 0);
1050         }
1051
1052 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1053         {
1054         long l;
1055
1056         switch (cmd)
1057                 {
1058         case SSL_CTRL_GET_READ_AHEAD:
1059                 return(s->read_ahead);
1060         case SSL_CTRL_SET_READ_AHEAD:
1061                 l=s->read_ahead;
1062                 s->read_ahead=larg;
1063                 return(l);
1064
1065         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1066                 s->msg_callback_arg = parg;
1067                 return 1;
1068
1069         case SSL_CTRL_OPTIONS:
1070                 return(s->options|=larg);
1071         case SSL_CTRL_CLEAR_OPTIONS:
1072                 return(s->options&=~larg);
1073         case SSL_CTRL_MODE:
1074                 return(s->mode|=larg);
1075         case SSL_CTRL_CLEAR_MODE:
1076                 return(s->mode &=~larg);
1077         case SSL_CTRL_GET_MAX_CERT_LIST:
1078                 return(s->max_cert_list);
1079         case SSL_CTRL_SET_MAX_CERT_LIST:
1080                 l=s->max_cert_list;
1081                 s->max_cert_list=larg;
1082                 return(l);
1083         case SSL_CTRL_SET_MTU:
1084 #ifndef OPENSSL_NO_DTLS1
1085                 if (larg < (long)dtls1_min_mtu())
1086                         return 0;
1087 #endif
1088
1089                 if (SSL_version(s) == DTLS1_VERSION ||
1090                     SSL_version(s) == DTLS1_BAD_VER)
1091                         {
1092                         s->d1->mtu = larg;
1093                         return larg;
1094                         }
1095                 return 0;
1096         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1097                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1098                         return 0;
1099                 s->max_send_fragment = larg;
1100                 return 1;
1101         case SSL_CTRL_GET_RI_SUPPORT:
1102                 if (s->s3)
1103                         return s->s3->send_connection_binding;
1104                 else return 0;
1105         default:
1106                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1107                 }
1108         }
1109
1110 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1111         {
1112         switch(cmd)
1113                 {
1114         case SSL_CTRL_SET_MSG_CALLBACK:
1115                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1116                 return 1;
1117
1118         default:
1119                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1120                 }
1121         }
1122
1123 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1124         {
1125         return ctx->sessions;
1126         }
1127
1128 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1129         {
1130         long l;
1131
1132         switch (cmd)
1133                 {
1134         case SSL_CTRL_GET_READ_AHEAD:
1135                 return(ctx->read_ahead);
1136         case SSL_CTRL_SET_READ_AHEAD:
1137                 l=ctx->read_ahead;
1138                 ctx->read_ahead=larg;
1139                 return(l);
1140
1141         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1142                 ctx->msg_callback_arg = parg;
1143                 return 1;
1144
1145         case SSL_CTRL_GET_MAX_CERT_LIST:
1146                 return(ctx->max_cert_list);
1147         case SSL_CTRL_SET_MAX_CERT_LIST:
1148                 l=ctx->max_cert_list;
1149                 ctx->max_cert_list=larg;
1150                 return(l);
1151
1152         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1153                 l=ctx->session_cache_size;
1154                 ctx->session_cache_size=larg;
1155                 return(l);
1156         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1157                 return(ctx->session_cache_size);
1158         case SSL_CTRL_SET_SESS_CACHE_MODE:
1159                 l=ctx->session_cache_mode;
1160                 ctx->session_cache_mode=larg;
1161                 return(l);
1162         case SSL_CTRL_GET_SESS_CACHE_MODE:
1163                 return(ctx->session_cache_mode);
1164
1165         case SSL_CTRL_SESS_NUMBER:
1166                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1167         case SSL_CTRL_SESS_CONNECT:
1168                 return(ctx->stats.sess_connect);
1169         case SSL_CTRL_SESS_CONNECT_GOOD:
1170                 return(ctx->stats.sess_connect_good);
1171         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1172                 return(ctx->stats.sess_connect_renegotiate);
1173         case SSL_CTRL_SESS_ACCEPT:
1174                 return(ctx->stats.sess_accept);
1175         case SSL_CTRL_SESS_ACCEPT_GOOD:
1176                 return(ctx->stats.sess_accept_good);
1177         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1178                 return(ctx->stats.sess_accept_renegotiate);
1179         case SSL_CTRL_SESS_HIT:
1180                 return(ctx->stats.sess_hit);
1181         case SSL_CTRL_SESS_CB_HIT:
1182                 return(ctx->stats.sess_cb_hit);
1183         case SSL_CTRL_SESS_MISSES:
1184                 return(ctx->stats.sess_miss);
1185         case SSL_CTRL_SESS_TIMEOUTS:
1186                 return(ctx->stats.sess_timeout);
1187         case SSL_CTRL_SESS_CACHE_FULL:
1188                 return(ctx->stats.sess_cache_full);
1189         case SSL_CTRL_OPTIONS:
1190                 return(ctx->options|=larg);
1191         case SSL_CTRL_CLEAR_OPTIONS:
1192                 return(ctx->options&=~larg);
1193         case SSL_CTRL_MODE:
1194                 return(ctx->mode|=larg);
1195         case SSL_CTRL_CLEAR_MODE:
1196                 return(ctx->mode&=~larg);
1197         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1198                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1199                         return 0;
1200                 ctx->max_send_fragment = larg;
1201                 return 1;
1202         default:
1203                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1204                 }
1205         }
1206
1207 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1208         {
1209         switch(cmd)
1210                 {
1211         case SSL_CTRL_SET_MSG_CALLBACK:
1212                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1213                 return 1;
1214
1215         default:
1216                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1217                 }
1218         }
1219
1220 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1221         {
1222         long l;
1223
1224         l=a->id-b->id;
1225         if (l == 0L)
1226                 return(0);
1227         else
1228                 return((l > 0)?1:-1);
1229         }
1230
1231 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1232                         const SSL_CIPHER * const *bp)
1233         {
1234         long l;
1235
1236         l=(*ap)->id-(*bp)->id;
1237         if (l == 0L)
1238                 return(0);
1239         else
1240                 return((l > 0)?1:-1);
1241         }
1242
1243 /** return a STACK of the ciphers available for the SSL and in order of
1244  * preference */
1245 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1246         {
1247         if (s != NULL)
1248                 {
1249                 if (s->cipher_list != NULL)
1250                         {
1251                         return(s->cipher_list);
1252                         }
1253                 else if ((s->ctx != NULL) &&
1254                         (s->ctx->cipher_list != NULL))
1255                         {
1256                         return(s->ctx->cipher_list);
1257                         }
1258                 }
1259         return(NULL);
1260         }
1261
1262 /** return a STACK of the ciphers available for the SSL and in order of
1263  * algorithm id */
1264 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1265         {
1266         if (s != NULL)
1267                 {
1268                 if (s->cipher_list_by_id != NULL)
1269                         {
1270                         return(s->cipher_list_by_id);
1271                         }
1272                 else if ((s->ctx != NULL) &&
1273                         (s->ctx->cipher_list_by_id != NULL))
1274                         {
1275                         return(s->ctx->cipher_list_by_id);
1276                         }
1277                 }
1278         return(NULL);
1279         }
1280
1281 /** The old interface to get the same thing as SSL_get_ciphers() */
1282 const char *SSL_get_cipher_list(const SSL *s,int n)
1283         {
1284         SSL_CIPHER *c;
1285         STACK_OF(SSL_CIPHER) *sk;
1286
1287         if (s == NULL) return(NULL);
1288         sk=SSL_get_ciphers(s);
1289         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1290                 return(NULL);
1291         c=sk_SSL_CIPHER_value(sk,n);
1292         if (c == NULL) return(NULL);
1293         return(c->name);
1294         }
1295
1296 /** specify the ciphers to be used by default by the SSL_CTX */
1297 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1298         {
1299         STACK_OF(SSL_CIPHER) *sk;
1300
1301         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1302                 &ctx->cipher_list_by_id,str);
1303         /* ssl_create_cipher_list may return an empty stack if it
1304          * was unable to find a cipher matching the given rule string
1305          * (for example if the rule string specifies a cipher which
1306          * has been disabled). This is not an error as far as
1307          * ssl_create_cipher_list is concerned, and hence
1308          * ctx->cipher_list and ctx->cipher_list_by_id has been
1309          * updated. */
1310         if (sk == NULL)
1311                 return 0;
1312         else if (sk_SSL_CIPHER_num(sk) == 0)
1313                 {
1314                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1315                 return 0;
1316                 }
1317         return 1;
1318         }
1319
1320 /** specify the ciphers to be used by the SSL */
1321 int SSL_set_cipher_list(SSL *s,const char *str)
1322         {
1323         STACK_OF(SSL_CIPHER) *sk;
1324
1325         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1326                 &s->cipher_list_by_id,str);
1327         /* see comment in SSL_CTX_set_cipher_list */
1328         if (sk == NULL)
1329                 return 0;
1330         else if (sk_SSL_CIPHER_num(sk) == 0)
1331                 {
1332                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1333                 return 0;
1334                 }
1335         return 1;
1336         }
1337
1338 /* works well for SSLv2, not so good for SSLv3 */
1339 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1340         {
1341         char *p;
1342         STACK_OF(SSL_CIPHER) *sk;
1343         SSL_CIPHER *c;
1344         int i;
1345
1346         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1347                 (len < 2))
1348                 return(NULL);
1349
1350         p=buf;
1351         sk=s->session->ciphers;
1352         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1353                 {
1354                 int n;
1355
1356                 c=sk_SSL_CIPHER_value(sk,i);
1357                 n=strlen(c->name);
1358                 if (n+1 > len)
1359                         {
1360                         if (p != buf)
1361                                 --p;
1362                         *p='\0';
1363                         return buf;
1364                         }
1365                 strcpy(p,c->name);
1366                 p+=n;
1367                 *(p++)=':';
1368                 len-=n+1;
1369                 }
1370         p[-1]='\0';
1371         return(buf);
1372         }
1373
1374 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1375                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1376         {
1377         int i,j=0;
1378         SSL_CIPHER *c;
1379         unsigned char *q;
1380 #ifndef OPENSSL_NO_KRB5
1381         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1382 #endif /* OPENSSL_NO_KRB5 */
1383
1384         if (sk == NULL) return(0);
1385         q=p;
1386         if (put_cb == NULL)
1387                 put_cb = s->method->put_cipher_by_char;
1388
1389         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1390                 {
1391                 c=sk_SSL_CIPHER_value(sk,i);
1392                 /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */
1393                 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
1394                         (TLS1_get_client_version(s) < TLS1_2_VERSION))
1395                         continue;
1396 #ifndef OPENSSL_NO_KRB5
1397                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1398                     nokrb5)
1399                     continue;
1400 #endif /* OPENSSL_NO_KRB5 */
1401 #ifndef OPENSSL_NO_PSK
1402                 /* with PSK there must be client callback set */
1403                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1404                     s->psk_client_callback == NULL)
1405                         continue;
1406 #endif /* OPENSSL_NO_PSK */
1407 #ifndef OPENSSL_NO_SRP
1408                 if (((c->algorithm_mkey & SSL_kSRP) || (c->algorithm_auth & SSL_aSRP)) &&
1409                     !(s->srp_ctx.srp_Mask & SSL_kSRP))
1410                     continue;
1411 #endif /* OPENSSL_NO_SRP */
1412                 j = put_cb(c,p);
1413                 p+=j;
1414                 }
1415         /* If p == q, no ciphers; caller indicates an error.
1416          * Otherwise, add applicable SCSVs. */
1417         if (p != q)
1418                 {
1419                 if (!s->renegotiate)
1420                         {
1421                         static SSL_CIPHER scsv =
1422                                 {
1423                                 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1424                                 };
1425                         j = put_cb(&scsv,p);
1426                         p+=j;
1427 #ifdef OPENSSL_RI_DEBUG
1428                         fprintf(stderr, "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
1429 #endif
1430                         }
1431
1432                 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
1433                         {
1434                         static SSL_CIPHER scsv =
1435                                 {
1436                                 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1437                                 };
1438                         j = put_cb(&scsv,p);
1439                         p+=j;
1440                         }
1441                 }
1442
1443         return(p-q);
1444         }
1445
1446 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1447                                                STACK_OF(SSL_CIPHER) **skp)
1448         {
1449         const SSL_CIPHER *c;
1450         STACK_OF(SSL_CIPHER) *sk;
1451         int i,n;
1452
1453         if (s->s3)
1454                 s->s3->send_connection_binding = 0;
1455
1456         n=ssl_put_cipher_by_char(s,NULL,NULL);
1457         if (n == 0 || (num%n) != 0)
1458                 {
1459                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1460                 return(NULL);
1461                 }
1462         if ((skp == NULL) || (*skp == NULL))
1463                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1464         else
1465                 {
1466                 sk= *skp;
1467                 sk_SSL_CIPHER_zero(sk);
1468                 }
1469
1470         for (i=0; i<num; i+=n)
1471                 {
1472                 /* Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV */
1473                 if (s->s3 && (n != 3 || !p[0]) &&
1474                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1475                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1476                         {
1477                         /* SCSV fatal if renegotiating */
1478                         if (s->renegotiate)
1479                                 {
1480                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1481                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1482                                 goto err;
1483                                 }
1484                         s->s3->send_connection_binding = 1;
1485                         p += n;
1486 #ifdef OPENSSL_RI_DEBUG
1487                         fprintf(stderr, "SCSV received by server\n");
1488 #endif
1489                         continue;
1490                         }
1491
1492                 /* Check for TLS_FALLBACK_SCSV */
1493                 if ((n != 3 || !p[0]) &&
1494                         (p[n-2] == ((SSL3_CK_FALLBACK_SCSV >> 8) & 0xff)) &&
1495                         (p[n-1] == (SSL3_CK_FALLBACK_SCSV & 0xff)))
1496                         {
1497                         /* The SCSV indicates that the client previously tried a higher version.
1498                          * Fail if the current version is an unexpected downgrade. */
1499                         if (!SSL_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, 0, NULL))
1500                                 {
1501                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_INAPPROPRIATE_FALLBACK);
1502                                 if (s->s3)
1503                                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INAPPROPRIATE_FALLBACK);
1504                                 goto err;
1505                                 }
1506                         continue;
1507                         }
1508
1509                 c=ssl_get_cipher_by_char(s,p);
1510                 p+=n;
1511                 if (c != NULL)
1512                         {
1513                         if (!sk_SSL_CIPHER_push(sk,c))
1514                                 {
1515                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1516                                 goto err;
1517                                 }
1518                         }
1519                 }
1520
1521         if (skp != NULL)
1522                 *skp=sk;
1523         return(sk);
1524 err:
1525         if ((skp == NULL) || (*skp == NULL))
1526                 sk_SSL_CIPHER_free(sk);
1527         return(NULL);
1528         }
1529
1530
1531 #ifndef OPENSSL_NO_TLSEXT
1532 /** return a servername extension value if provided in Client Hello, or NULL.
1533  * So far, only host_name types are defined (RFC 3546).
1534  */
1535
1536 const char *SSL_get_servername(const SSL *s, const int type)
1537         {
1538         if (type != TLSEXT_NAMETYPE_host_name)
1539                 return NULL;
1540
1541         return s->session && !s->tlsext_hostname ?
1542                 s->session->tlsext_hostname :
1543                 s->tlsext_hostname;
1544         }
1545
1546 int SSL_get_servername_type(const SSL *s)
1547         {
1548         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1549                 return TLSEXT_NAMETYPE_host_name;
1550         return -1;
1551         }
1552
1553 # ifndef OPENSSL_NO_NEXTPROTONEG
1554 /* SSL_select_next_proto implements the standard protocol selection. It is
1555  * expected that this function is called from the callback set by
1556  * SSL_CTX_set_next_proto_select_cb.
1557  *
1558  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1559  * strings. The length byte itself is not included in the length. A byte
1560  * string of length 0 is invalid. No byte string may be truncated.
1561  *
1562  * The current, but experimental algorithm for selecting the protocol is:
1563  *
1564  * 1) If the server doesn't support NPN then this is indicated to the
1565  * callback. In this case, the client application has to abort the connection
1566  * or have a default application level protocol.
1567  *
1568  * 2) If the server supports NPN, but advertises an empty list then the
1569  * client selects the first protcol in its list, but indicates via the
1570  * API that this fallback case was enacted.
1571  *
1572  * 3) Otherwise, the client finds the first protocol in the server's list
1573  * that it supports and selects this protocol. This is because it's
1574  * assumed that the server has better information about which protocol
1575  * a client should use.
1576  *
1577  * 4) If the client doesn't support any of the server's advertised
1578  * protocols, then this is treated the same as case 2.
1579  *
1580  * It returns either
1581  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1582  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1583  */
1584 int SSL_select_next_proto(unsigned char **out, unsigned char *outlen, const unsigned char *server, unsigned int server_len, const unsigned char *client, unsigned int client_len)
1585         {
1586         unsigned int i, j;
1587         const unsigned char *result;
1588         int status = OPENSSL_NPN_UNSUPPORTED;
1589
1590         /* For each protocol in server preference order, see if we support it. */
1591         for (i = 0; i < server_len; )
1592                 {
1593                 for (j = 0; j < client_len; )
1594                         {
1595                         if (server[i] == client[j] &&
1596                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1597                                 {
1598                                 /* We found a match */
1599                                 result = &server[i];
1600                                 status = OPENSSL_NPN_NEGOTIATED;
1601                                 goto found;
1602                                 }
1603                         j += client[j];
1604                         j++;
1605                         }
1606                 i += server[i];
1607                 i++;
1608                 }
1609
1610         /* There's no overlap between our protocols and the server's list. */
1611         result = client;
1612         status = OPENSSL_NPN_NO_OVERLAP;
1613
1614         found:
1615         *out = (unsigned char *) result + 1;
1616         *outlen = result[0];
1617         return status;
1618         }
1619
1620 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1621  * requested protocol for this connection and returns 0. If the client didn't
1622  * request any protocol, then *data is set to NULL.
1623  *
1624  * Note that the client can request any protocol it chooses. The value returned
1625  * from this function need not be a member of the list of supported protocols
1626  * provided by the callback.
1627  */
1628 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1629         {
1630         *data = s->next_proto_negotiated;
1631         if (!*data) {
1632                 *len = 0;
1633         } else {
1634                 *len = s->next_proto_negotiated_len;
1635         }
1636 }
1637
1638 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1639  * TLS server needs a list of supported protocols for Next Protocol
1640  * Negotiation. The returned list must be in wire format.  The list is returned
1641  * by setting |out| to point to it and |outlen| to its length. This memory will
1642  * not be modified, but one should assume that the SSL* keeps a reference to
1643  * it.
1644  *
1645  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1646  * such extension will be included in the ServerHello. */
1647 void SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx, int (*cb) (SSL *ssl, const unsigned char **out, unsigned int *outlen, void *arg), void *arg)
1648         {
1649         ctx->next_protos_advertised_cb = cb;
1650         ctx->next_protos_advertised_cb_arg = arg;
1651         }
1652
1653 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1654  * client needs to select a protocol from the server's provided list. |out|
1655  * must be set to point to the selected protocol (which may be within |in|).
1656  * The length of the protocol name must be written into |outlen|. The server's
1657  * advertised protocols are provided in |in| and |inlen|. The callback can
1658  * assume that |in| is syntactically valid.
1659  *
1660  * The client must select a protocol. It is fatal to the connection if this
1661  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1662  */
1663 void SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx, int (*cb) (SSL *s, unsigned char **out, unsigned char *outlen, const unsigned char *in, unsigned int inlen, void *arg), void *arg)
1664         {
1665         ctx->next_proto_select_cb = cb;
1666         ctx->next_proto_select_cb_arg = arg;
1667         }
1668 # endif
1669 #endif
1670
1671 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1672         const char *label, size_t llen, const unsigned char *p, size_t plen,
1673         int use_context)
1674         {
1675         if (s->version < TLS1_VERSION)
1676                 return -1;
1677
1678         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1679                                                            llen, p, plen,
1680                                                            use_context);
1681         }
1682
1683 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1684         {
1685         unsigned long l;
1686
1687         l=(unsigned long)
1688                 ((unsigned int) a->session_id[0]     )|
1689                 ((unsigned int) a->session_id[1]<< 8L)|
1690                 ((unsigned long)a->session_id[2]<<16L)|
1691                 ((unsigned long)a->session_id[3]<<24L);
1692         return(l);
1693         }
1694
1695 /* NB: If this function (or indeed the hash function which uses a sort of
1696  * coarser function than this one) is changed, ensure
1697  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1698  * able to construct an SSL_SESSION that will collide with any existing session
1699  * with a matching session ID. */
1700 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1701         {
1702         if (a->ssl_version != b->ssl_version)
1703                 return(1);
1704         if (a->session_id_length != b->session_id_length)
1705                 return(1);
1706         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1707         }
1708
1709 /* These wrapper functions should remain rather than redeclaring
1710  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1711  * variable. The reason is that the functions aren't static, they're exposed via
1712  * ssl.h. */
1713 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1714 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1715
1716 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1717         {
1718         SSL_CTX *ret=NULL;
1719
1720         if (meth == NULL)
1721                 {
1722                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1723                 return(NULL);
1724                 }
1725
1726 #ifdef OPENSSL_FIPS
1727         if (FIPS_mode() && (meth->version < TLS1_VERSION))
1728                 {
1729                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1730                 return NULL;
1731                 }
1732 #endif
1733
1734         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1735                 {
1736                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1737                 goto err;
1738                 }
1739         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1740         if (ret == NULL)
1741                 goto err;
1742
1743         memset(ret,0,sizeof(SSL_CTX));
1744
1745         ret->method=meth;
1746
1747         ret->cert_store=NULL;
1748         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1749         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1750         ret->session_cache_head=NULL;
1751         ret->session_cache_tail=NULL;
1752
1753         /* We take the system default */
1754         ret->session_timeout=meth->get_timeout();
1755
1756         ret->new_session_cb=0;
1757         ret->remove_session_cb=0;
1758         ret->get_session_cb=0;
1759         ret->generate_session_id=0;
1760
1761         memset((char *)&ret->stats,0,sizeof(ret->stats));
1762
1763         ret->references=1;
1764         ret->quiet_shutdown=0;
1765
1766 /*      ret->cipher=NULL;*/
1767 /*      ret->s2->challenge=NULL;
1768         ret->master_key=NULL;
1769         ret->key_arg=NULL;
1770         ret->s2->conn_id=NULL; */
1771
1772         ret->info_callback=NULL;
1773
1774         ret->app_verify_callback=0;
1775         ret->app_verify_arg=NULL;
1776
1777         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1778         ret->read_ahead=0;
1779         ret->msg_callback=0;
1780         ret->msg_callback_arg=NULL;
1781         ret->verify_mode=SSL_VERIFY_NONE;
1782 #if 0
1783         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1784 #endif
1785         ret->sid_ctx_length=0;
1786         ret->default_verify_callback=NULL;
1787         if ((ret->cert=ssl_cert_new()) == NULL)
1788                 goto err;
1789
1790         ret->default_passwd_callback=0;
1791         ret->default_passwd_callback_userdata=NULL;
1792         ret->client_cert_cb=0;
1793         ret->app_gen_cookie_cb=0;
1794         ret->app_verify_cookie_cb=0;
1795
1796         ret->sessions=lh_SSL_SESSION_new();
1797         if (ret->sessions == NULL) goto err;
1798         ret->cert_store=X509_STORE_new();
1799         if (ret->cert_store == NULL) goto err;
1800
1801         ssl_create_cipher_list(ret->method,
1802                 &ret->cipher_list,&ret->cipher_list_by_id,
1803                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1804         if (ret->cipher_list == NULL
1805             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1806                 {
1807                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1808                 goto err2;
1809                 }
1810
1811         ret->param = X509_VERIFY_PARAM_new();
1812         if (!ret->param)
1813                 goto err;
1814
1815         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1816                 {
1817                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1818                 goto err2;
1819                 }
1820         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1821                 {
1822                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1823                 goto err2;
1824                 }
1825         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1826                 {
1827                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1828                 goto err2;
1829                 }
1830
1831         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1832                 goto err;
1833
1834         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1835
1836         ret->extra_certs=NULL;
1837         ret->comp_methods=SSL_COMP_get_compression_methods();
1838
1839         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1840
1841 #ifndef OPENSSL_NO_TLSEXT
1842         ret->tlsext_servername_callback = 0;
1843         ret->tlsext_servername_arg = NULL;
1844         /* Setup RFC4507 ticket keys */
1845         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1846                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1847                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1848                 ret->options |= SSL_OP_NO_TICKET;
1849
1850         ret->tlsext_status_cb = 0;
1851         ret->tlsext_status_arg = NULL;
1852
1853 # ifndef OPENSSL_NO_NEXTPROTONEG
1854         ret->next_protos_advertised_cb = 0;
1855         ret->next_proto_select_cb = 0;
1856 # endif
1857 #endif
1858 #ifndef OPENSSL_NO_PSK
1859         ret->psk_identity_hint=NULL;
1860         ret->psk_client_callback=NULL;
1861         ret->psk_server_callback=NULL;
1862 #endif
1863 #ifndef OPENSSL_NO_SRP
1864         SSL_CTX_SRP_CTX_init(ret);
1865 #endif
1866 #ifndef OPENSSL_NO_BUF_FREELISTS
1867         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1868         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1869         if (!ret->rbuf_freelist)
1870                 goto err;
1871         ret->rbuf_freelist->chunklen = 0;
1872         ret->rbuf_freelist->len = 0;
1873         ret->rbuf_freelist->head = NULL;
1874         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1875         if (!ret->wbuf_freelist)
1876                 {
1877                 OPENSSL_free(ret->rbuf_freelist);
1878                 goto err;
1879                 }
1880         ret->wbuf_freelist->chunklen = 0;
1881         ret->wbuf_freelist->len = 0;
1882         ret->wbuf_freelist->head = NULL;
1883 #endif
1884 #ifndef OPENSSL_NO_ENGINE
1885         ret->client_cert_engine = NULL;
1886 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1887 #define eng_strx(x)     #x
1888 #define eng_str(x)      eng_strx(x)
1889         /* Use specific client engine automatically... ignore errors */
1890         {
1891         ENGINE *eng;
1892         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1893         if (!eng)
1894                 {
1895                 ERR_clear_error();
1896                 ENGINE_load_builtin_engines();
1897                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1898                 }
1899         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1900                 ERR_clear_error();
1901         }
1902 #endif
1903 #endif
1904         /* Default is to connect to non-RI servers. When RI is more widely
1905          * deployed might change this.
1906          */
1907         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1908
1909         return(ret);
1910 err:
1911         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1912 err2:
1913         if (ret != NULL) SSL_CTX_free(ret);
1914         return(NULL);
1915         }
1916
1917 #if 0
1918 static void SSL_COMP_free(SSL_COMP *comp)
1919     { OPENSSL_free(comp); }
1920 #endif
1921
1922 #ifndef OPENSSL_NO_BUF_FREELISTS
1923 static void
1924 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1925         {
1926         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1927         for (ent = list->head; ent; ent = next)
1928                 {
1929                 next = ent->next;
1930                 OPENSSL_free(ent);
1931                 }
1932         OPENSSL_free(list);
1933         }
1934 #endif
1935
1936 void SSL_CTX_free(SSL_CTX *a)
1937         {
1938         int i;
1939
1940         if (a == NULL) return;
1941
1942         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1943 #ifdef REF_PRINT
1944         REF_PRINT("SSL_CTX",a);
1945 #endif
1946         if (i > 0) return;
1947 #ifdef REF_CHECK
1948         if (i < 0)
1949                 {
1950                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1951                 abort(); /* ok */
1952                 }
1953 #endif
1954
1955         if (a->param)
1956                 X509_VERIFY_PARAM_free(a->param);
1957
1958         /*
1959          * Free internal session cache. However: the remove_cb() may reference
1960          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1961          * after the sessions were flushed.
1962          * As the ex_data handling routines might also touch the session cache,
1963          * the most secure solution seems to be: empty (flush) the cache, then
1964          * free ex_data, then finally free the cache.
1965          * (See ticket [openssl.org #212].)
1966          */
1967         if (a->sessions != NULL)
1968                 SSL_CTX_flush_sessions(a,0);
1969
1970         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1971
1972         if (a->sessions != NULL)
1973                 lh_SSL_SESSION_free(a->sessions);
1974
1975         if (a->cert_store != NULL)
1976                 X509_STORE_free(a->cert_store);
1977         if (a->cipher_list != NULL)
1978                 sk_SSL_CIPHER_free(a->cipher_list);
1979         if (a->cipher_list_by_id != NULL)
1980                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1981         if (a->cert != NULL)
1982                 ssl_cert_free(a->cert);
1983         if (a->client_CA != NULL)
1984                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1985         if (a->extra_certs != NULL)
1986                 sk_X509_pop_free(a->extra_certs,X509_free);
1987 #if 0 /* This should never be done, since it removes a global database */
1988         if (a->comp_methods != NULL)
1989                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1990 #else
1991         a->comp_methods = NULL;
1992 #endif
1993
1994 #ifndef OPENSSL_NO_SRTP
1995         if (a->srtp_profiles)
1996                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
1997 #endif
1998
1999 #ifndef OPENSSL_NO_PSK
2000         if (a->psk_identity_hint)
2001                 OPENSSL_free(a->psk_identity_hint);
2002 #endif
2003 #ifndef OPENSSL_NO_SRP
2004         SSL_CTX_SRP_CTX_free(a);
2005 #endif
2006 #ifndef OPENSSL_NO_ENGINE
2007         if (a->client_cert_engine)
2008                 ENGINE_finish(a->client_cert_engine);
2009 #endif
2010
2011 #ifndef OPENSSL_NO_BUF_FREELISTS
2012         if (a->wbuf_freelist)
2013                 ssl_buf_freelist_free(a->wbuf_freelist);
2014         if (a->rbuf_freelist)
2015                 ssl_buf_freelist_free(a->rbuf_freelist);
2016 #endif
2017
2018         OPENSSL_free(a);
2019         }
2020
2021 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2022         {
2023         ctx->default_passwd_callback=cb;
2024         }
2025
2026 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2027         {
2028         ctx->default_passwd_callback_userdata=u;
2029         }
2030
2031 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2032         {
2033         ctx->app_verify_callback=cb;
2034         ctx->app_verify_arg=arg;
2035         }
2036
2037 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2038         {
2039         ctx->verify_mode=mode;
2040         ctx->default_verify_callback=cb;
2041         }
2042
2043 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2044         {
2045         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2046         }
2047
2048 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2049         {
2050         CERT_PKEY *cpk;
2051         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2052         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2053         int rsa_tmp_export,dh_tmp_export,kl;
2054         unsigned long mask_k,mask_a,emask_k,emask_a;
2055         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
2056 #ifndef OPENSSL_NO_ECDH
2057         int have_ecdh_tmp;
2058 #endif
2059         X509 *x = NULL;
2060         EVP_PKEY *ecc_pkey = NULL;
2061         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2062
2063         if (c == NULL) return;
2064
2065         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2066
2067 #ifndef OPENSSL_NO_RSA
2068         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2069         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2070                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2071 #else
2072         rsa_tmp=rsa_tmp_export=0;
2073 #endif
2074 #ifndef OPENSSL_NO_DH
2075         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2076         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2077                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2078 #else
2079         dh_tmp=dh_tmp_export=0;
2080 #endif
2081
2082 #ifndef OPENSSL_NO_ECDH
2083         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
2084 #endif
2085         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2086         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
2087         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2088         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2089         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2090         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2091         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2092         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2093         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2094         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2095         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2096 /* FIX THIS EAY EAY EAY */
2097         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2098         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2099         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2100         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
2101         mask_k=0;
2102         mask_a=0;
2103         emask_k=0;
2104         emask_a=0;
2105
2106
2107
2108 #ifdef CIPHER_DEBUG
2109         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2110                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2111                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2112 #endif
2113
2114         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2115         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2116                 mask_k |= SSL_kGOST;
2117                 mask_a |= SSL_aGOST01;
2118         }
2119         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2120         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2121                 mask_k |= SSL_kGOST;
2122                 mask_a |= SSL_aGOST94;
2123         }
2124
2125         if (rsa_enc || (rsa_tmp && rsa_sign))
2126                 mask_k|=SSL_kRSA;
2127         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2128                 emask_k|=SSL_kRSA;
2129
2130 #if 0
2131         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2132         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2133                 (rsa_enc || rsa_sign || dsa_sign))
2134                 mask_k|=SSL_kEDH;
2135         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2136                 (rsa_enc || rsa_sign || dsa_sign))
2137                 emask_k|=SSL_kEDH;
2138 #endif
2139
2140         if (dh_tmp_export)
2141                 emask_k|=SSL_kEDH;
2142
2143         if (dh_tmp)
2144                 mask_k|=SSL_kEDH;
2145
2146         if (dh_rsa) mask_k|=SSL_kDHr;
2147         if (dh_rsa_export) emask_k|=SSL_kDHr;
2148
2149         if (dh_dsa) mask_k|=SSL_kDHd;
2150         if (dh_dsa_export) emask_k|=SSL_kDHd;
2151
2152         if (rsa_enc || rsa_sign)
2153                 {
2154                 mask_a|=SSL_aRSA;
2155                 emask_a|=SSL_aRSA;
2156                 }
2157
2158         if (dsa_sign)
2159                 {
2160                 mask_a|=SSL_aDSS;
2161                 emask_a|=SSL_aDSS;
2162                 }
2163
2164         mask_a|=SSL_aNULL;
2165         emask_a|=SSL_aNULL;
2166
2167 #ifndef OPENSSL_NO_KRB5
2168         mask_k|=SSL_kKRB5;
2169         mask_a|=SSL_aKRB5;
2170         emask_k|=SSL_kKRB5;
2171         emask_a|=SSL_aKRB5;
2172 #endif
2173
2174         /* An ECC certificate may be usable for ECDH and/or
2175          * ECDSA cipher suites depending on the key usage extension.
2176          */
2177         if (have_ecc_cert)
2178                 {
2179                 /* This call populates extension flags (ex_flags) */
2180                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
2181                 X509_check_purpose(x, -1, 0);
2182                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2183                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2184                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2185                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2186                 ecc_pkey = X509_get_pubkey(x);
2187                 ecc_pkey_size = (ecc_pkey != NULL) ?
2188                     EVP_PKEY_bits(ecc_pkey) : 0;
2189                 EVP_PKEY_free(ecc_pkey);
2190                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2191                         {
2192                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2193                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2194                         }
2195 #ifndef OPENSSL_NO_ECDH
2196                 if (ecdh_ok)
2197                         {
2198
2199                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2200                                 {
2201                                 mask_k|=SSL_kECDHr;
2202                                 mask_a|=SSL_aECDH;
2203                                 if (ecc_pkey_size <= 163)
2204                                         {
2205                                         emask_k|=SSL_kECDHr;
2206                                         emask_a|=SSL_aECDH;
2207                                         }
2208                                 }
2209
2210                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2211                                 {
2212                                 mask_k|=SSL_kECDHe;
2213                                 mask_a|=SSL_aECDH;
2214                                 if (ecc_pkey_size <= 163)
2215                                         {
2216                                         emask_k|=SSL_kECDHe;
2217                                         emask_a|=SSL_aECDH;
2218                                         }
2219                                 }
2220                         }
2221 #endif
2222 #ifndef OPENSSL_NO_ECDSA
2223                 if (ecdsa_ok)
2224                         {
2225                         mask_a|=SSL_aECDSA;
2226                         emask_a|=SSL_aECDSA;
2227                         }
2228 #endif
2229                 }
2230
2231 #ifndef OPENSSL_NO_ECDH
2232         if (have_ecdh_tmp)
2233                 {
2234                 mask_k|=SSL_kEECDH;
2235                 emask_k|=SSL_kEECDH;
2236                 }
2237 #endif
2238
2239 #ifndef OPENSSL_NO_PSK
2240         mask_k |= SSL_kPSK;
2241         mask_a |= SSL_aPSK;
2242         emask_k |= SSL_kPSK;
2243         emask_a |= SSL_aPSK;
2244 #endif
2245
2246         c->mask_k=mask_k;
2247         c->mask_a=mask_a;
2248         c->export_mask_k=emask_k;
2249         c->export_mask_a=emask_a;
2250         c->valid=1;
2251         }
2252
2253 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2254 #define ku_reject(x, usage) \
2255         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2256
2257 #ifndef OPENSSL_NO_EC
2258
2259 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2260         {
2261         unsigned long alg_k, alg_a;
2262         EVP_PKEY *pkey = NULL;
2263         int keysize = 0;
2264         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2265         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2266
2267         alg_k = cs->algorithm_mkey;
2268         alg_a = cs->algorithm_auth;
2269
2270         if (SSL_C_IS_EXPORT(cs))
2271                 {
2272                 /* ECDH key length in export ciphers must be <= 163 bits */
2273                 pkey = X509_get_pubkey(x);
2274                 if (pkey == NULL) return 0;
2275                 keysize = EVP_PKEY_bits(pkey);
2276                 EVP_PKEY_free(pkey);
2277                 if (keysize > 163) return 0;
2278                 }
2279
2280         /* This call populates the ex_flags field correctly */
2281         X509_check_purpose(x, -1, 0);
2282         if ((x->sig_alg) && (x->sig_alg->algorithm))
2283                 {
2284                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2285                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2286                 }
2287         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2288                 {
2289                 /* key usage, if present, must allow key agreement */
2290                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2291                         {
2292                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2293                         return 0;
2294                         }
2295                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2296                         {
2297                         /* signature alg must be ECDSA */
2298                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2299                                 {
2300                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2301                                 return 0;
2302                                 }
2303                         }
2304                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2305                         {
2306                         /* signature alg must be RSA */
2307
2308                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2309                                 {
2310                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2311                                 return 0;
2312                                 }
2313                         }
2314                 }
2315         if (alg_a & SSL_aECDSA)
2316                 {
2317                 /* key usage, if present, must allow signing */
2318                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2319                         {
2320                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2321                         return 0;
2322                         }
2323                 }
2324
2325         return 1;  /* all checks are ok */
2326         }
2327
2328 #endif
2329
2330 /* THIS NEEDS CLEANING UP */
2331 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2332         {
2333         unsigned long alg_k,alg_a;
2334         CERT *c;
2335         int i;
2336
2337         c=s->cert;
2338         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2339
2340         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2341         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2342
2343         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2344                 {
2345                 /* we don't need to look at SSL_kEECDH
2346                  * since no certificate is needed for
2347                  * anon ECDH and for authenticated
2348                  * EECDH, the check for the auth
2349                  * algorithm will set i correctly
2350                  * NOTE: For ECDH-RSA, we need an ECC
2351                  * not an RSA cert but for EECDH-RSA
2352                  * we need an RSA cert. Placing the
2353                  * checks for SSL_kECDH before RSA
2354                  * checks ensures the correct cert is chosen.
2355                  */
2356                 i=SSL_PKEY_ECC;
2357                 }
2358         else if (alg_a & SSL_aECDSA)
2359                 {
2360                 i=SSL_PKEY_ECC;
2361                 }
2362         else if (alg_k & SSL_kDHr)
2363                 i=SSL_PKEY_DH_RSA;
2364         else if (alg_k & SSL_kDHd)
2365                 i=SSL_PKEY_DH_DSA;
2366         else if (alg_a & SSL_aDSS)
2367                 i=SSL_PKEY_DSA_SIGN;
2368         else if (alg_a & SSL_aRSA)
2369                 {
2370                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2371                         i=SSL_PKEY_RSA_SIGN;
2372                 else
2373                         i=SSL_PKEY_RSA_ENC;
2374                 }
2375         else if (alg_a & SSL_aKRB5)
2376                 {
2377                 /* VRS something else here? */
2378                 return(NULL);
2379                 }
2380         else if (alg_a & SSL_aGOST94)
2381                 i=SSL_PKEY_GOST94;
2382         else if (alg_a & SSL_aGOST01)
2383                 i=SSL_PKEY_GOST01;
2384         else /* if (alg_a & SSL_aNULL) */
2385                 {
2386                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY,ERR_R_INTERNAL_ERROR);
2387                 return(NULL);
2388                 }
2389
2390         return c->pkeys + i;
2391         }
2392
2393 X509 *ssl_get_server_send_cert(const SSL *s)
2394         {
2395         CERT_PKEY *cpk;
2396         cpk = ssl_get_server_send_pkey(s);
2397         if (!cpk)
2398                 return NULL;
2399         return cpk->x509;
2400         }
2401
2402 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2403         {
2404         unsigned long alg_a;
2405         CERT *c;
2406         int idx = -1;
2407
2408         alg_a = cipher->algorithm_auth;
2409         c=s->cert;
2410
2411         if ((alg_a & SSL_aDSS) &&
2412                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2413                 idx = SSL_PKEY_DSA_SIGN;
2414         else if (alg_a & SSL_aRSA)
2415                 {
2416                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2417                         idx = SSL_PKEY_RSA_SIGN;
2418                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2419                         idx = SSL_PKEY_RSA_ENC;
2420                 }
2421         else if ((alg_a & SSL_aECDSA) &&
2422                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2423                 idx = SSL_PKEY_ECC;
2424         if (idx == -1)
2425                 {
2426                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2427                 return(NULL);
2428                 }
2429         if (pmd)
2430                 *pmd = c->pkeys[idx].digest;
2431         return c->pkeys[idx].privatekey;
2432         }
2433
2434 void ssl_update_cache(SSL *s,int mode)
2435         {
2436         int i;
2437
2438         /* If the session_id_length is 0, we are not supposed to cache it,
2439          * and it would be rather hard to do anyway :-) */
2440         if (s->session->session_id_length == 0) return;
2441
2442         i=s->session_ctx->session_cache_mode;
2443         if ((i & mode) && (!s->hit)
2444                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2445                     || SSL_CTX_add_session(s->session_ctx,s->session))
2446                 && (s->session_ctx->new_session_cb != NULL))
2447                 {
2448                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2449                 if (!s->session_ctx->new_session_cb(s,s->session))
2450                         SSL_SESSION_free(s->session);
2451                 }
2452
2453         /* auto flush every 255 connections */
2454         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2455                 ((i & mode) == mode))
2456                 {
2457                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2458                         ?s->session_ctx->stats.sess_connect_good
2459                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2460                         {
2461                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2462                         }
2463                 }
2464         }
2465
2466 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2467         {
2468         return(s->method);
2469         }
2470
2471 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2472         {
2473         int conn= -1;
2474         int ret=1;
2475
2476         if (s->method != meth)
2477                 {
2478                 if (s->handshake_func != NULL)
2479                         conn=(s->handshake_func == s->method->ssl_connect);
2480
2481                 if (s->method->version == meth->version)
2482                         s->method=meth;
2483                 else
2484                         {
2485                         s->method->ssl_free(s);
2486                         s->method=meth;
2487                         ret=s->method->ssl_new(s);
2488                         }
2489
2490                 if (conn == 1)
2491                         s->handshake_func=meth->ssl_connect;
2492                 else if (conn == 0)
2493                         s->handshake_func=meth->ssl_accept;
2494                 }
2495         return(ret);
2496         }
2497
2498 int SSL_get_error(const SSL *s,int i)
2499         {
2500         int reason;
2501         unsigned long l;
2502         BIO *bio;
2503
2504         if (i > 0) return(SSL_ERROR_NONE);
2505
2506         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2507          * etc, where we do encode the error */
2508         if ((l=ERR_peek_error()) != 0)
2509                 {
2510                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2511                         return(SSL_ERROR_SYSCALL);
2512                 else
2513                         return(SSL_ERROR_SSL);
2514                 }
2515
2516         if ((i < 0) && SSL_want_read(s))
2517                 {
2518                 bio=SSL_get_rbio(s);
2519                 if (BIO_should_read(bio))
2520                         return(SSL_ERROR_WANT_READ);
2521                 else if (BIO_should_write(bio))
2522                         /* This one doesn't make too much sense ... We never try
2523                          * to write to the rbio, and an application program where
2524                          * rbio and wbio are separate couldn't even know what it
2525                          * should wait for.
2526                          * However if we ever set s->rwstate incorrectly
2527                          * (so that we have SSL_want_read(s) instead of
2528                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2529                          * this test works around that bug; so it might be safer
2530                          * to keep it. */
2531                         return(SSL_ERROR_WANT_WRITE);
2532                 else if (BIO_should_io_special(bio))
2533                         {
2534                         reason=BIO_get_retry_reason(bio);
2535                         if (reason == BIO_RR_CONNECT)
2536                                 return(SSL_ERROR_WANT_CONNECT);
2537                         else if (reason == BIO_RR_ACCEPT)
2538                                 return(SSL_ERROR_WANT_ACCEPT);
2539                         else
2540                                 return(SSL_ERROR_SYSCALL); /* unknown */
2541                         }
2542                 }
2543
2544         if ((i < 0) && SSL_want_write(s))
2545                 {
2546                 bio=SSL_get_wbio(s);
2547                 if (BIO_should_write(bio))
2548                         return(SSL_ERROR_WANT_WRITE);
2549                 else if (BIO_should_read(bio))
2550                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2551                         return(SSL_ERROR_WANT_READ);
2552                 else if (BIO_should_io_special(bio))
2553                         {
2554                         reason=BIO_get_retry_reason(bio);
2555                         if (reason == BIO_RR_CONNECT)
2556                                 return(SSL_ERROR_WANT_CONNECT);
2557                         else if (reason == BIO_RR_ACCEPT)
2558                                 return(SSL_ERROR_WANT_ACCEPT);
2559                         else
2560                                 return(SSL_ERROR_SYSCALL);
2561                         }
2562                 }
2563         if ((i < 0) && SSL_want_x509_lookup(s))
2564                 {
2565                 return(SSL_ERROR_WANT_X509_LOOKUP);
2566                 }
2567
2568         if (i == 0)
2569                 {
2570                 if (s->version == SSL2_VERSION)
2571                         {
2572                         /* assume it is the socket being closed */
2573                         return(SSL_ERROR_ZERO_RETURN);
2574                         }
2575                 else
2576                         {
2577                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2578                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2579                                 return(SSL_ERROR_ZERO_RETURN);
2580                         }
2581                 }
2582         return(SSL_ERROR_SYSCALL);
2583         }
2584
2585 int SSL_do_handshake(SSL *s)
2586         {
2587         int ret=1;
2588
2589         if (s->handshake_func == NULL)
2590                 {
2591                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2592                 return(-1);
2593                 }
2594
2595         s->method->ssl_renegotiate_check(s);
2596
2597         if (SSL_in_init(s) || SSL_in_before(s))
2598                 {
2599                 ret=s->handshake_func(s);
2600                 }
2601         return(ret);
2602         }
2603
2604 /* For the next 2 functions, SSL_clear() sets shutdown and so
2605  * one of these calls will reset it */
2606 void SSL_set_accept_state(SSL *s)
2607         {
2608         s->server=1;
2609         s->shutdown=0;
2610         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2611         s->handshake_func=s->method->ssl_accept;
2612         /* clear the current cipher */
2613         ssl_clear_cipher_ctx(s);
2614         ssl_clear_hash_ctx(&s->read_hash);
2615         ssl_clear_hash_ctx(&s->write_hash);
2616         }
2617
2618 void SSL_set_connect_state(SSL *s)
2619         {
2620         s->server=0;
2621         s->shutdown=0;
2622         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2623         s->handshake_func=s->method->ssl_connect;
2624         /* clear the current cipher */
2625         ssl_clear_cipher_ctx(s);
2626         ssl_clear_hash_ctx(&s->read_hash);
2627         ssl_clear_hash_ctx(&s->write_hash);
2628         }
2629
2630 int ssl_undefined_function(SSL *s)
2631         {
2632         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2633         return(0);
2634         }
2635
2636 int ssl_undefined_void_function(void)
2637         {
2638         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2639         return(0);
2640         }
2641
2642 int ssl_undefined_const_function(const SSL *s)
2643         {
2644         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2645         return(0);
2646         }
2647
2648 SSL_METHOD *ssl_bad_method(int ver)
2649         {
2650         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2651         return(NULL);
2652         }
2653
2654 const char *SSL_get_version(const SSL *s)
2655         {
2656         if (s->version == TLS1_2_VERSION)
2657                 return("TLSv1.2");
2658         else if (s->version == TLS1_1_VERSION)
2659                 return("TLSv1.1");
2660         else if (s->version == TLS1_VERSION)
2661                 return("TLSv1");
2662         else if (s->version == SSL3_VERSION)
2663                 return("SSLv3");
2664         else if (s->version == SSL2_VERSION)
2665                 return("SSLv2");
2666         else
2667                 return("unknown");
2668         }
2669
2670 SSL *SSL_dup(SSL *s)
2671         {
2672         STACK_OF(X509_NAME) *sk;
2673         X509_NAME *xn;
2674         SSL *ret;
2675         int i;
2676
2677         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2678             return(NULL);
2679
2680         ret->version = s->version;
2681         ret->type = s->type;
2682         ret->method = s->method;
2683
2684         if (s->session != NULL)
2685                 {
2686                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2687                 SSL_copy_session_id(ret,s);
2688                 }
2689         else
2690                 {
2691                 /* No session has been established yet, so we have to expect
2692                  * that s->cert or ret->cert will be changed later --
2693                  * they should not both point to the same object,
2694                  * and thus we can't use SSL_copy_session_id. */
2695
2696                 ret->method->ssl_free(ret);
2697                 ret->method = s->method;
2698                 ret->method->ssl_new(ret);
2699
2700                 if (s->cert != NULL)
2701                         {
2702                         if (ret->cert != NULL)
2703                                 {
2704                                 ssl_cert_free(ret->cert);
2705                                 }
2706                         ret->cert = ssl_cert_dup(s->cert);
2707                         if (ret->cert == NULL)
2708                                 goto err;
2709                         }
2710
2711                 SSL_set_session_id_context(ret,
2712                         s->sid_ctx, s->sid_ctx_length);
2713                 }
2714
2715         ret->options=s->options;
2716         ret->mode=s->mode;
2717         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2718         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2719         ret->msg_callback = s->msg_callback;
2720         ret->msg_callback_arg = s->msg_callback_arg;
2721         SSL_set_verify(ret,SSL_get_verify_mode(s),
2722                 SSL_get_verify_callback(s));
2723         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2724         ret->generate_session_id = s->generate_session_id;
2725
2726         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2727
2728         ret->debug=s->debug;
2729
2730         /* copy app data, a little dangerous perhaps */
2731         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2732                 goto err;
2733
2734         /* setup rbio, and wbio */
2735         if (s->rbio != NULL)
2736                 {
2737                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2738                         goto err;
2739                 }
2740         if (s->wbio != NULL)
2741                 {
2742                 if (s->wbio != s->rbio)
2743                         {
2744                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2745                                 goto err;
2746                         }
2747                 else
2748                         ret->wbio=ret->rbio;
2749                 }
2750         ret->rwstate = s->rwstate;
2751         ret->in_handshake = s->in_handshake;
2752         ret->handshake_func = s->handshake_func;
2753         ret->server = s->server;
2754         ret->renegotiate = s->renegotiate;
2755         ret->new_session = s->new_session;
2756         ret->quiet_shutdown = s->quiet_shutdown;
2757         ret->shutdown=s->shutdown;
2758         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2759         ret->rstate=s->rstate;
2760         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2761         ret->hit=s->hit;
2762
2763         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2764
2765         /* dup the cipher_list and cipher_list_by_id stacks */
2766         if (s->cipher_list != NULL)
2767                 {
2768                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2769                         goto err;
2770                 }
2771         if (s->cipher_list_by_id != NULL)
2772                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2773                         == NULL)
2774                         goto err;
2775
2776         /* Dup the client_CA list */
2777         if (s->client_CA != NULL)
2778                 {
2779                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2780                 ret->client_CA=sk;
2781                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2782                         {
2783                         xn=sk_X509_NAME_value(sk,i);
2784                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2785                                 {
2786                                 X509_NAME_free(xn);
2787                                 goto err;
2788                                 }
2789                         }
2790                 }
2791
2792         if (0)
2793                 {
2794 err:
2795                 if (ret != NULL) SSL_free(ret);
2796                 ret=NULL;
2797                 }
2798         return(ret);
2799         }
2800
2801 void ssl_clear_cipher_ctx(SSL *s)
2802         {
2803         if (s->enc_read_ctx != NULL)
2804                 {
2805                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2806                 OPENSSL_free(s->enc_read_ctx);
2807                 s->enc_read_ctx=NULL;
2808                 }
2809         if (s->enc_write_ctx != NULL)
2810                 {
2811                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2812                 OPENSSL_free(s->enc_write_ctx);
2813                 s->enc_write_ctx=NULL;
2814                 }
2815 #ifndef OPENSSL_NO_COMP
2816         if (s->expand != NULL)
2817                 {
2818                 COMP_CTX_free(s->expand);
2819                 s->expand=NULL;
2820                 }
2821         if (s->compress != NULL)
2822                 {
2823                 COMP_CTX_free(s->compress);
2824                 s->compress=NULL;
2825                 }
2826 #endif
2827         }
2828
2829 /* Fix this function so that it takes an optional type parameter */
2830 X509 *SSL_get_certificate(const SSL *s)
2831         {
2832         if (s->server)
2833                 return(ssl_get_server_send_cert(s));
2834         else if (s->cert != NULL)
2835                 return(s->cert->key->x509);
2836         else
2837                 return(NULL);
2838         }
2839
2840 /* Fix this function so that it takes an optional type parameter */
2841 EVP_PKEY *SSL_get_privatekey(SSL *s)
2842         {
2843         if (s->cert != NULL)
2844                 return(s->cert->key->privatekey);
2845         else
2846                 return(NULL);
2847         }
2848
2849 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2850         {
2851         if ((s->session != NULL) && (s->session->cipher != NULL))
2852                 return(s->session->cipher);
2853         return(NULL);
2854         }
2855 #ifdef OPENSSL_NO_COMP
2856 const void *SSL_get_current_compression(SSL *s)
2857         {
2858         return NULL;
2859         }
2860 const void *SSL_get_current_expansion(SSL *s)
2861         {
2862         return NULL;
2863         }
2864 #else
2865
2866 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2867         {
2868         if (s->compress != NULL)
2869                 return(s->compress->meth);
2870         return(NULL);
2871         }
2872
2873 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2874         {
2875         if (s->expand != NULL)
2876                 return(s->expand->meth);
2877         return(NULL);
2878         }
2879 #endif
2880
2881 int ssl_init_wbio_buffer(SSL *s,int push)
2882         {
2883         BIO *bbio;
2884
2885         if (s->bbio == NULL)
2886                 {
2887                 bbio=BIO_new(BIO_f_buffer());
2888                 if (bbio == NULL) return(0);
2889                 s->bbio=bbio;
2890                 }
2891         else
2892                 {
2893                 bbio=s->bbio;
2894                 if (s->bbio == s->wbio)
2895                         s->wbio=BIO_pop(s->wbio);
2896                 }
2897         (void)BIO_reset(bbio);
2898 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2899         if (!BIO_set_read_buffer_size(bbio,1))
2900                 {
2901                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2902                 return(0);
2903                 }
2904         if (push)
2905                 {
2906                 if (s->wbio != bbio)
2907                         s->wbio=BIO_push(bbio,s->wbio);
2908                 }
2909         else
2910                 {
2911                 if (s->wbio == bbio)
2912                         s->wbio=BIO_pop(bbio);
2913                 }
2914         return(1);
2915         }
2916
2917 void ssl_free_wbio_buffer(SSL *s)
2918         {
2919         if (s->bbio == NULL) return;
2920
2921         if (s->bbio == s->wbio)
2922                 {
2923                 /* remove buffering */
2924                 s->wbio=BIO_pop(s->wbio);
2925 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2926                 assert(s->wbio != NULL);
2927 #endif
2928         }
2929         BIO_free(s->bbio);
2930         s->bbio=NULL;
2931         }
2932
2933 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2934         {
2935         ctx->quiet_shutdown=mode;
2936         }
2937
2938 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2939         {
2940         return(ctx->quiet_shutdown);
2941         }
2942
2943 void SSL_set_quiet_shutdown(SSL *s,int mode)
2944         {
2945         s->quiet_shutdown=mode;
2946         }
2947
2948 int SSL_get_quiet_shutdown(const SSL *s)
2949         {
2950         return(s->quiet_shutdown);
2951         }
2952
2953 void SSL_set_shutdown(SSL *s,int mode)
2954         {
2955         s->shutdown=mode;
2956         }
2957
2958 int SSL_get_shutdown(const SSL *s)
2959         {
2960         return(s->shutdown);
2961         }
2962
2963 int SSL_version(const SSL *s)
2964         {
2965         return(s->version);
2966         }
2967
2968 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2969         {
2970         return(ssl->ctx);
2971         }
2972
2973 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2974         {
2975         CERT *ocert = ssl->cert;
2976         if (ssl->ctx == ctx)
2977                 return ssl->ctx;
2978 #ifndef OPENSSL_NO_TLSEXT
2979         if (ctx == NULL)
2980                 ctx = ssl->initial_ctx;
2981 #endif
2982         ssl->cert = ssl_cert_dup(ctx->cert);
2983         if (ocert != NULL)
2984                 {
2985                 int i;
2986                 /* Copy negotiated digests from original */
2987                 for (i = 0; i < SSL_PKEY_NUM; i++)
2988                         {
2989                         CERT_PKEY *cpk = ocert->pkeys + i;
2990                         CERT_PKEY *rpk = ssl->cert->pkeys + i;
2991                         rpk->digest = cpk->digest;
2992                         }
2993                 ssl_cert_free(ocert);
2994                 }
2995
2996         /*
2997          * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH),
2998          * so setter APIs must prevent invalid lengths from entering the system.
2999          */
3000         OPENSSL_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx));
3001
3002         /*
3003          * If the session ID context matches that of the parent SSL_CTX,
3004          * inherit it from the new SSL_CTX as well. If however the context does
3005          * not match (i.e., it was set per-ssl with SSL_set_session_id_context),
3006          * leave it unchanged.
3007          */
3008         if ((ssl->ctx != NULL) &&
3009                 (ssl->sid_ctx_length == ssl->ctx->sid_ctx_length) &&
3010                 (memcmp(ssl->sid_ctx, ssl->ctx->sid_ctx, ssl->sid_ctx_length) == 0))
3011                 {
3012                 ssl->sid_ctx_length = ctx->sid_ctx_length;
3013                 memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx));
3014                 }
3015
3016         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3017         if (ssl->ctx != NULL)
3018                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3019         ssl->ctx = ctx;
3020
3021         return(ssl->ctx);
3022         }
3023
3024 #ifndef OPENSSL_NO_STDIO
3025 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3026         {
3027         return(X509_STORE_set_default_paths(ctx->cert_store));
3028         }
3029
3030 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3031                 const char *CApath)
3032         {
3033         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3034         }
3035 #endif
3036
3037 void SSL_set_info_callback(SSL *ssl,
3038         void (*cb)(const SSL *ssl,int type,int val))
3039         {
3040         ssl->info_callback=cb;
3041         }
3042
3043 /* One compiler (Diab DCC) doesn't like argument names in returned
3044    function pointer.  */
3045 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3046         {
3047         return ssl->info_callback;
3048         }
3049
3050 int SSL_state(const SSL *ssl)
3051         {
3052         return(ssl->state);
3053         }
3054
3055 void SSL_set_state(SSL *ssl, int state)
3056         {
3057         ssl->state = state;
3058         }
3059
3060 void SSL_set_verify_result(SSL *ssl,long arg)
3061         {
3062         ssl->verify_result=arg;
3063         }
3064
3065 long SSL_get_verify_result(const SSL *ssl)
3066         {
3067         return(ssl->verify_result);
3068         }
3069
3070 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3071                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3072         {
3073         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3074                                 new_func, dup_func, free_func);
3075         }
3076
3077 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3078         {
3079         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3080         }
3081
3082 void *SSL_get_ex_data(const SSL *s,int idx)
3083         {
3084         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3085         }
3086
3087 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3088                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3089         {
3090         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3091                                 new_func, dup_func, free_func);
3092         }
3093
3094 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3095         {
3096         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3097         }
3098
3099 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3100         {
3101         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3102         }
3103
3104 int ssl_ok(SSL *s)
3105         {
3106         return(1);
3107         }
3108
3109 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3110         {
3111         return(ctx->cert_store);
3112         }
3113
3114 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3115         {
3116         if (ctx->cert_store != NULL)
3117                 X509_STORE_free(ctx->cert_store);
3118         ctx->cert_store=store;
3119         }
3120
3121 int SSL_want(const SSL *s)
3122         {
3123         return(s->rwstate);
3124         }
3125
3126 /*!
3127  * \brief Set the callback for generating temporary RSA keys.
3128  * \param ctx the SSL context.
3129  * \param cb the callback
3130  */
3131
3132 #ifndef OPENSSL_NO_RSA
3133 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3134                                                           int is_export,
3135                                                           int keylength))
3136     {
3137     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3138     }
3139
3140 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3141                                                   int is_export,
3142                                                   int keylength))
3143     {
3144     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3145     }
3146 #endif
3147
3148 #ifdef DOXYGEN
3149 /*!
3150  * \brief The RSA temporary key callback function.
3151  * \param ssl the SSL session.
3152  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3153  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3154  * of the required key in bits.
3155  * \return the temporary RSA key.
3156  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3157  */
3158
3159 RSA *cb(SSL *ssl,int is_export,int keylength)
3160     {}
3161 #endif
3162
3163 /*!
3164  * \brief Set the callback for generating temporary DH keys.
3165  * \param ctx the SSL context.
3166  * \param dh the callback
3167  */
3168
3169 #ifndef OPENSSL_NO_DH
3170 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3171                                                         int keylength))
3172         {
3173         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3174         }
3175
3176 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3177                                                 int keylength))
3178         {
3179         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3180         }
3181 #endif
3182
3183 #ifndef OPENSSL_NO_ECDH
3184 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3185                                                                 int keylength))
3186         {
3187         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3188         }
3189
3190 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3191                                                         int keylength))
3192         {
3193         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3194         }
3195 #endif
3196
3197 #ifndef OPENSSL_NO_PSK
3198 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3199         {
3200         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3201                 {
3202                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3203                 return 0;
3204                 }
3205         if (ctx->psk_identity_hint != NULL)
3206                 OPENSSL_free(ctx->psk_identity_hint);
3207         if (identity_hint != NULL)
3208                 {
3209                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3210                 if (ctx->psk_identity_hint == NULL)
3211                         return 0;
3212                 }
3213         else
3214                 ctx->psk_identity_hint = NULL;
3215         return 1;
3216         }
3217
3218 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3219         {
3220         if (s == NULL)
3221                 return 0;
3222
3223         if (s->session == NULL)
3224                 return 1; /* session not created yet, ignored */
3225
3226         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3227                 {
3228                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3229                 return 0;
3230                 }
3231         if (s->session->psk_identity_hint != NULL)
3232                 OPENSSL_free(s->session->psk_identity_hint);
3233         if (identity_hint != NULL)
3234                 {
3235                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3236                 if (s->session->psk_identity_hint == NULL)
3237                         return 0;
3238                 }
3239         else
3240                 s->session->psk_identity_hint = NULL;
3241         return 1;
3242         }
3243
3244 const char *SSL_get_psk_identity_hint(const SSL *s)
3245         {
3246         if (s == NULL || s->session == NULL)
3247                 return NULL;
3248         return(s->session->psk_identity_hint);
3249         }
3250
3251 const char *SSL_get_psk_identity(const SSL *s)
3252         {
3253         if (s == NULL || s->session == NULL)
3254                 return NULL;
3255         return(s->session->psk_identity);
3256         }
3257
3258 void SSL_set_psk_client_callback(SSL *s,
3259     unsigned int (*cb)(SSL *ssl, const char *hint,
3260                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3261                        unsigned int max_psk_len))
3262         {
3263         s->psk_client_callback = cb;
3264         }
3265
3266 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3267     unsigned int (*cb)(SSL *ssl, const char *hint,
3268                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3269                        unsigned int max_psk_len))
3270         {
3271         ctx->psk_client_callback = cb;
3272         }
3273
3274 void SSL_set_psk_server_callback(SSL *s,
3275     unsigned int (*cb)(SSL *ssl, const char *identity,
3276                        unsigned char *psk, unsigned int max_psk_len))
3277         {
3278         s->psk_server_callback = cb;
3279         }
3280
3281 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3282     unsigned int (*cb)(SSL *ssl, const char *identity,
3283                        unsigned char *psk, unsigned int max_psk_len))
3284         {
3285         ctx->psk_server_callback = cb;
3286         }
3287 #endif
3288
3289 void SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
3290         {
3291         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3292         }
3293 void SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
3294         {
3295         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3296         }
3297
3298 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3299  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3300  * any. If EVP_MD pointer is passed, initializes ctx with this md
3301  * Returns newly allocated ctx;
3302  */
3303
3304 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md)
3305 {
3306         ssl_clear_hash_ctx(hash);
3307         *hash = EVP_MD_CTX_create();
3308         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3309         return *hash;
3310 }
3311 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3312 {
3313
3314         if (*hash) EVP_MD_CTX_destroy(*hash);
3315         *hash=NULL;
3316 }
3317
3318 void SSL_set_debug(SSL *s, int debug)
3319         {
3320         s->debug = debug;
3321         }
3322
3323 int SSL_cache_hit(SSL *s)
3324         {
3325         return s->hit;
3326         }
3327
3328 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3329 #include "../crypto/bio/bss_file.c"
3330 #endif
3331
3332 IMPLEMENT_STACK_OF(SSL_CIPHER)
3333 IMPLEMENT_STACK_OF(SSL_COMP)
3334 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3335                                     ssl_cipher_id);